AI Article Synopsis
- A study using green fluorescent protein (GFP) indicated that granulated activated carbon (GAC) particles create a favorable environment for the growth of the phenol-degrading bacterium Pseudomonas putida F1, resulting in a denser and more viable biofilm compared to non-activated carbon.
- Laser scanning confocal microscopy revealed that biofilms on GAC had significantly more green fluorescence near its surface, indicating higher microbial activity.
- Quantitative analysis using COMSTAT confirmed that the GAC biofilm had greater biomass concentration and led to better effluent quality, suggesting that GAC provides a larger surface area for bacterial growth and substrate interaction than non-activated carbon.
Article Abstract
A favorable microenvironment for biofilm growth on GAC particles was shown using green fluorescent protein (GFP) as a marker for a phenol degrading bacterium, Pseudomonas putida F1. The dispersion of P. putida F1 in a biofilm covering granulated activated carbon (GAC) particles was monitored and compared to a biofilm on non-activated granular carbon particles. Laser scanning confocal microscopy (LSCM) micrographs of the biofilms taken from two fluidized bed reactors operating under identical conditions, showed higher fluorescent green areas in the GAC biofilm, especially close to the GAC surface. Quantitative analysis of the biofilm by COMSTAT, a three-dimensional biofilm structure analysis program, showed higher biomass concentration and higher viability in the GAC covered biofilm vs. the non-activated carbon biofilm. In addition, better effluent quality was measured for the BGAC reactor, which strongly suggests a significantly larger biofilm surface area available to the substrate, as opposed to that of the non-activated carbon carrier reactor.
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| http://dx.doi.org/10.1016/j.watres.2006.05.006 | DOI Listing |
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